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问题 计算题

宇航员站在一星球表面上，沿水平方向以初速度v0从倾斜角为θ的斜面顶端P处抛出一个小球，测得经过时间t小球落在斜面上的另一点Q，已知该星球的半径为R，求：

（1）该星球表面的重力加速度；

（2）该星球的第一宇宙速度。

答案

解：（1）小球从P到Q的过程中，由平抛运动规律得：

       ①

       ②

      因为 ③

      由①②③得： ④

（2）对星球表面附的卫星有：  ⑤

      由④⑤得：

单项选择题

Selection to participate in a top executive-education program is an important rung on the ladder to top corporate jobs. U. S. corporations (1) billions of dollars in this form of management development -- and use it to (2) and train fast-track managers. Yet one (3) of executive education found that less than 5% of the managers (4) to these high-profile programs are women -- and minorities are terribly (5) as well.

The numbers are (6) . In regular business (7) usually paid for by the participant, not an employer -- there are plenty of women and minorities. Women, for example, (8) for about 30% of MBA candidates. Yet in the (9) programs paid for by corporations that round out a manager’s credentials at a (10) career point, usually at age 40 or 45, companies are making only a (11) investment in developing female and minority executives. A case (12) point: Only about 30% of the 180 executives in Stanford’s recent (13) management program were women.

Most companies say these days they are (14) hiring and promoting women and minorities-- and there are some (15) trends in overall employment and pay levels so why are companies (16) the ball when it (17) executive education The schools (18) that they are neither the cause of nor the cure for the problem. A Harvard Business School dean figures that companies are (19) of sending their female executives (20) they don’t want to lose them to competitors.

18（）

A.apprehend

B.verify

C.maintain

D.promise
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单项选择题

上级管理部门查库要出示相关证件，被查单位进行登记，查库人查库要填写（）查库人要亲自动手核点库存，不得监而不查。

A、现金登记薄

B、查库登记薄

C、委派会计日志
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